Roof Chimney Flashing Details

Chimneys have a foundation which may be independent from the house.

Roof chimney flashing details. The base of the counterflashing should include a hemmed drip edge to manage the water figure 12. Copper cap flashing then covers the upper edge. Mc14 chimney flashing pan type. Two ways to flash roof edges.

Mc14a chimney flashing step type. Prebent step flashing 8 x 8 in. Mc15 chimney cricket flashing pan type. Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer.

The flashing should extend away from the chimney past the base or step flashing before taking a sharp bend downward to create a capillary break an air space that will not allow capillary suction of water from below. Here is a specific side view of the primary flashing head flashing detail with a shingle roof covering the base of the head flashing. Details roofing wrb flashing. You ll need one for.

The front back and side flashing metal. Counterflashing will cover the tops of the step flashing. Chimney flashing flat roof copper base flashing is attached to the roof deck before installation of the roofing. Roofers call these shingle tins.

Order about 12 in. Some lumberyards stock a dormer flashing. Mc12a pan flashing roof to sidewall 2. It extends at least 8 up the wall and at least 4 onto the roof on all sides of the chimney.

Masonry chimneys allowing for movement. This section of the primary flashing extends across the face of the chimney to divert runoff around the chimney. Press the flashing into the urethane to achieve a positive seal. For extra protection run a bead of urethane between the step flashing and the chimney.

Bottom before the base. The front and back are custom fabricated to order for an exact fit. Kits made from copper lead coated copper freedom gray and tcsii are always soldered while aluminum parts are riveted and can be sealed before installation. On a chimney flashing.

Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. Aluminum generally is not used since it is not compatible with masonry mortar. More than the width of the chimney. Flashing is installed to surround roof features such as vents chimneys and skylights.

As you roof along a chimney alternate shingles and l shaped pieces of step flashing. Mc16 skylight underlayment detail. Mc15a chimney cricket flashing step type. The minimum depth of the reglet should be 1 in but 1 in.

Mc12b metal flashing options. In addition to the saddle you ll need the following sheet metal parts see figure a.